Machine for operating on shoes



Nov. 26, 1940. N. H. KNOWLTON 2.222,774

- MACHINE FOR OPERATING 0N SHOES Filed May 26, 1959 4a mm Patented Nov. 26, 1940 2,222,774 MACHINE FOR OPERATING N snoEs Norwo'odH. Knowlton, Rockport, Mass, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application May 26, 1939, Serial No. 275,944

7 Claims. (Cl. 12-51) invention relates to machines for operatir on shoes, and is herein illustrated as embodied in a machine for pounding and ironing the bottom or a shoe after it is lasted and before the outer sole is attached.

In the manufacture of many kinds of shoes, particularly of the McKay type, it is necessary, after the upper has been lasted in over the insole, to treat the lasting margin so that the bottom of ti 1 shoe will present a smooth, fiat surface to wmch the cutsole may be attached. To this end, it is usual to employ a bottom pounding common type of which comprises a ider with a series of axially arclles each carrying a row of loosely g rings, which, under the inlce of centrifugal force, beat against the bottom of the shoe.

To supplement the pounding machine, however, it is desirable to employ some means for ironing out the lasting margin in order to remove wrinkles or ridges that may be left by the pounding rings, and to level out any high spots that may remain because of the tendency of the rows of poundin rings to conform to the o1 of the shoe bottom. Such an operamust at resent, however, if it is performed all,

cs carried enters a separate step. With these considerationsin view, it is an object of the present invention to increase the effectiveness 1 machines employed for this purpose by providing a machine which, in addition topounding the lasting margin into intimate contact with the insole, will act to iron out any wrinkles or high spots in the shoe bottom without necessitating an additional operation on the shoe.

To this end, the invention provides a shoe bottom po nding and ironing machine comprisa cylindrical roll having a plurality of peripheral ironing ribs, and a plurality of rows of pounding elements positioned between the ribs.

The invention further contemplates means for heating the ribs to cause them to shrink the leather as they rub against it.

By the use of such heating means, the efiiciency of the ironing ribs is substantially increased.

hot irons tend to shrink the upper material where it overlies the insole, and thus to eliminate many or" the wrinkles formed when the lasting margin of the upper is attached to the insole.

The invention will be better understood When considered in relation to the accompanying drawing, in which Fig. l. is a front elevation of the machine, a part of the roll being broken away to show the detaiis of its construction;

Fig. 21s a section of the machine along the line 11-11 of Fig. 1, showing the pounding elements operating upon a shoe; and

3 is a view similar to Fig. 2, showing the ironing element operating on a shoe.

As illustrated in the drawing, the machine, comprises a frame It, in which is journaled a 10 shaft 52. A roll M, comprising a hub It, a web #8 and a rim 2%, is mounted on the shaft and held rigid therewith by a pin 22 passing through the hub It? of the roll and the shaft.

As has been pointed out, it is desirable that 5 the roll should act to perform two functions, first,

to pound the lasting margininto firm contact with the insole and, second, to iron out any wrinkles or irregularities so that the shoe bottom will be smooth and flat. The pounding ac- 20 tion is efiected by a number of rows of beater elements M, which, as illustrated, are in the form of rings, though they may equally well be made other shapes. These beater elements are loosely carried in a number of circular passages formed axially of the roll, and intersecting its peripher", so that they form slots, the side walls of which are undercut to prevent the rings from flying out when the roll is rotated. It will be noted that the passages are 30 somewhat larger in diameter than the rings. When the roll is rotating, centrifugal force causes the rings to move outwardly in the passages, there being sufiicient clearance laterally between the rings to prevent binding. Lateral 35 movement is limited, however, by two annular plates 28 fastened to the ends of the roll by screws 30. This construction permits the rings to yield inwardly when a shoe is pressed against them, and thus the row of rings as a whole will conform to the curvature of the shoe bottom. The rows of rings are staggered by using thicker rings 32 at the end of every other row to eliminate any possibility that spaces between the rings might form ridges in the leather. By this 45 means, any ridge formed by one row of beater rings is pounded out by the next row.

The formation of the passages 26 leaves on the periphery of the roll a number of upstanding ribs 34. The surfaces of these ribs! are smooth, and the corners are rounded oiT so that as the roll rotates and the ironing ribs rub over the surface of the shoe, there will be no possibility of the ribs catching on the upper material and cutting or tearing it. The combined action of the rings and the ribs efiects an alternate beating and ironing action which produces an excellent surface to which the outsole may be attached.

The efficiency of the ironing ribs is greatly increased, however, by the use of heat. To this end there are provided two gas jets 36 which project into the opening in the side of the roll between the hub and the rim so that their flame is directed against the web I8, which transmits the heat to the ribs 34. To bring gas to the jets there are provided two pipes 33, running from a source of supply (not shown). The pipes are held in brackets 40 by set screws 42, the brackets being fastened to the frame by screws 44. In order to assist in supporting the shoe 8, a work rest 46 is provided, the work rest being held in a lug 48 on the frame by a set-screw 50.

In using the machine to prepare the bottom of a shoe for sole attaching the operator rests one side of the work on the support 46, presses the lasted margin M of the shoe bottom against the rotating roll and. moves the shoe lengthwise to present successive portions of the lasted margin to the roll. In this position the beater elements 24, which are held in their outmost position in the slots 26 by centrifugal force, strike against the lasted margin and pound it into firm contact with the insole. As the operator increases the pressure on the shoe against the roll, the beater elements are forced inwardly in the slots against the action of centrifugal force far enough so'that the heated ironing ribs can act upon the shoe bottom. The smooth heated surfaces .of the ribs iron out any Wrinkles in the lasted margin of the upper and because of the heat tend to shrink the leather slightly and cause it to conform more closely to the shape of the bottom of the last. Thus by the com- 40 bined use of heaters and heated irons, the shoe bottom is made smooth and flat, ready to receive the outsole.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A shoe bottom pounding tool comprising a cylindrical roll having a plurality of spaced peripheral ironing ribs extending axially of the roll, and a plurality of rows of pounding ele- 0 ments positioned about the circumference of the roll between the ribs.

2. A shoe bottom pounding tool comprising a cylindrical roll having a plurality of spaced peripheral ironing ribs the side walls of which are undercut to form between the ribs a plurality of partially enclosed passages extending axially of the roll, and a plurality of beater elements slightly smaller than the passage and loosely carried therein.

3. A shoe bottom pounding tool comprising a cylindrical roll having a plurality of spaced peripheral ironing ribs the side Walls of which are undercut to form a plurality of circular slots,

and a plurality of discoidal beater members having a diameter smaller than the slot and loosely carried therein.

4. A shoe bottom pounding tool comprising a cylindrical roll having a plurality of spaced peripheral ironing ribs the side walls of which are undercut to form a plurality of circular passages which extend longitudinally of the roll and intersect its periphery, a plurality of annular beater elements having a diameter smaller than that of the circular passage and loosely carried in the passage, and means for preventing substantial lateral movement of the annular beater elements.

5. A machine for operating on shoes comprising a frame, a shaft rotatably mounted in said frame, a pounding and ironing roll mounted on said shaft and having a plurality of spaced peripheral ironing ribs the side walls of which are undercut to form partially enclosed slots extending longitudinally of the roll, and a plurality of beater elements slightly smaller than the slot and loosely carried therein.

6. A machine for operating on shoes comprising a frame, a shaft rotatably mounted in said frame, a pounding and ironing roll mounted on said shaft and having a plurality of spaced peripheral ironing ribs the side walls of which are undercut to form a partially enclosed slot, a plurality of beater elements slightly smaller than the slot and loosely carried therein, and means for heating the ironing ribs.

'7. A machine for operating on shoes comprising a frame, a shaft rotatably mounted in said frame, a pounding and ironing roll mounted on said shaft and having a plurality of spaced peripheral ironing ribs the side walls of which are undercut to form a plurality of circular slots, a plurality of discoidal beater members having a diameter smaller than the slot and loosely carried therein, and means for heating the ironing ribs.

NORWOOD H. KNOWL'I'ON. 

